The oldest records of limestone mining and lime extraction in Kozy date back to the 18th century. Over time, one of the excavations that remained after the stone was mined became an impressive pond. According to oral accounts, during the period when the cavalry of Józef Piłsudski’s First Brigade of the Polish Legions were stationed in Kozy in the early 1915, the pond and the surrounding area became a training ground for the troops. According to another version, volunteers from Kozy, mainly members of the “Sokół” Gymnastic Association, who marched out in 1914 to join the forming Legions, gathered there – hence the popular name Legionary pond. In the 1930s the pond and the surrounding pine forest became a recreation ground for the Czecz family, the owners of the manor estate. They were also the founders of the nearby shrine with the statue of St. Barbara, the patron saint of miners. Near the pond stand the remains of the last brick kiln for burning lime. In the mid-19th century there were several lime kilns in Kozy. The manor house and the Jewish merchant Borger ran the lime kiln on an industrial scale. In the first half of the 20th century, the last two lime kilns belonged to Władysław Żurek. The firing technology required continuous operation of the kiln. It was filled from above with alternating coal and limestone and then the furnace was fired from below. The kiln capacity was between 7 and 10 tonnes of lime per day. The last user of the lime kiln was the Agricultural Circle (Kółko Rolnicze), which was still burning lime in the second half of the 20th century.